Why would I want to integrate the Merchant Processing? You can run the transactions through a terminal off to the side. But you can suffer from “Fat Fingering” or miss-typed amounts. It is not uncommon to have a salesperson ring up a sale for $ 197.00, then reach over to the terminal and type in $ 179.00. This means added time in dealing with the mistake, and possibly losing money and customers. An integrated Merchant Service will draw the amount directly from the receipt. This means no mistakes! The Merchant Service companies will have different plans and different rates. It is best to discuss you options with each of them to decide which service is right for you.